Alphadoku, 25x25 sudoku puzzle: Enter a puzzle solution to solve and play online,with tip on one or more squares.

You can have four possible answers: • One or several advices on one or several squares and the current solution is right. • One or several advices on one or several squares but the current solution is wrong. • No advice possible because the grid in progress is wrong or over. • Input Error with equal numbers in row, colomn or area.